Ink jet recording apparatus and ink jet recording method

Abstract

There is provided an ink jet recording apparatus equipped with an ink for ink jet recording, and a discharge unit that discharges a liquid droplet of the ink onto a recording medium, wherein the ink contains at least a colorant, a polymer particle, a water-soluble organic solvent, and water, and has a dynamic surface tension after 1 msec of 32 mN/m or less, a dynamic surface tension after 1 sec of less than 30 mN/m, when the dynamic surface tension is measured by a maximum bubble pressure method, and has a variation width in the dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m, a recording speed is from 10 m/min to 50 m/min.

What is claimed is: 
     
       1. An ink jet recording apparatus equipped with an ink for ink jet recording, and
 a discharge unit that discharges a liquid droplet of the ink onto a recording medium, 
 wherein the ink contains at least a colorant, a polymer particle, a water-soluble organic solvent, and water, and the ink has a dynamic surface tension after 1 msec of 32 mN/m or less, the dynamic surface tension after 1 msec being a dynamic surface tension when a bubble pressure reaches a maximum bubble pressure after 1 msec from a formation of a new interface at a capillary edge, when the dynamic surface tension is measured by a maximum bubble pressure method, the ink has a dynamic surface tension after 1 sec of less than 30 mN/m, the dynamic surface tension after 1 sec being a dynamic surface tension when a bubble pressure reaches a maximum bubble pressure after 1 sec from a formation of a new interface at a capillary edge, when the dynamic surface tension is measured by a maximum bubble pressure method, and the ink has a variation width in the dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m, 
 a recording speed is from 10 m/min to 50 m/min. 
 
     
     
       2. The ink jet recording apparatus according to  claim 1 ,
 wherein the recording medium is a roll of paper. 
 
     
     
       3. An ink jet recording method, comprising:
 a discharge step that discharges a liquid droplet of an ink onto a recording medium, 
 wherein the ink contains at least a colorant, a polymer particles, a water-soluble organic solvent, and water, and the ink has a dynamic surface tension after 1 msec of 32 mN/m or less, the dynamic surface tension after 1 msec being a dynamic surface tension when a bubble pressure reaches a maximum bubble pressure after 1 msec from a formation of a new interface at a capillary edge, when the dynamic surface tension is measured by a maximum bubble pressure method, the ink has a dynamic surface tension after 1 sec of less than 30 mN/m, the dynamic surface tension after 1 sec being a dynamic surface tension when a bubble pressure reaches a maximum bubble pressure after 1 sec from a formation of a new interface at a capillary edge, when the dynamic surface tension is measured by a maximum bubble pressure method, and the ink has a variation width in the dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m, 
 a recording speed is from 10 m/min to 50 m/min. 
 
     
     
       4. The ink jet recording method according to  claim 3 ,
 wherein the recording medium is a roll of paper. 
 
     
     
       5. The ink jet recording apparatus according to  claim 1 ,
 wherein the ink further comprises a surfactant with a HLB value of 14 or less. 
 
     
     
       6. The ink jet recording method according to  claim 3 ,
 wherein the ink further comprises a surfactant with a HLB value of 14 or less.